TypeScript

Use full service RPC for fetching latest blockhash. Nozomi only supports sendTransaction.

import { Connection, PublicKey, Keypair, TransactionInstruction, SystemProgram, TransactionMessage, VersionedTransaction, TransactionSignature } from "@solana/web3.js";

const NOZOMI_ENDPOINT = "https://nozomi.temporal.xyz/?c=<YOUR_API_KEY>";
const NOZOMI_TIP = new PublicKey("TEMPaMeCRFAS9EKF53Jd6KpHxgL47uWLcpFArU1Fanq");
const MIN_TIP_AMOUNT = 1_000_000;

const SOLANA_RPC_ENDPOINT = "https://api.mainnet-beta.solana.com";

async function sendNozomiTxn(ixns: TransactionInstruction[], signer: Keypair, nozomiRpcClient: Connection, solanaRpcClient: Connection): Promise<TransactionSignature> {
    const tipIxn = SystemProgram.transfer({
        fromPubkey: signer.publicKey,
        toPubkey: NOZOMI_TIP,
        lamports: MIN_TIP_AMOUNT
    });
    ixns.push(tipIxn);

    const { blockhash } = await solanaRpcClient.getLatestBlockhash();

    const messageV0 = new TransactionMessage({
        payerKey: signer.publicKey,
        recentBlockhash: blockhash,
        instructions: ixns,
    }).compileToV0Message();

    const versionedTxn = new VersionedTransaction(messageV0);

    versionedTxn.sign([signer]);

    return await nozomiRpcClient.sendTransaction(versionedTxn);
}

function buildIxns(): TransactionInstruction[] {
    // your instruction building logic here..
    return [];
}

async function main() {
    const nozomiRpcClient = new Connection(NOZOMI_ENDPOINT);

    const solanaRpcClient = new Connection(SOLANA_RPC_ENDPOINT);

    // replace with actual keypair loading logic
    const signer = Keypair.generate();

    const ixns = buildIxns();

    const signature = await sendNozomiTxn(ixns, signer, nozomiRpcClient, solanaRpcClient);

    console.log(`Transaction sent with signature: ${signature}`);
}

main().catch(err => {
    console.error(err);
});